/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/HierarchyEditor/NiagaraUserParametersHierarchyViewModel.h
Override this custom decorator function to provide custom widget visuals
virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > CreateCustomDecorator() const